ex2_s07 - University of Florida Department of Electrical &...

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EEL 4744—Spring 2007 Dr. Eric M. Schwartz Department of Electrical & Computer Engineering 10 April 2007 20-Apr-07 3:02 PM Page 1/13 Exam 2 , Last Name , First Name Instructions: Relax! Good luck! Go Gators! Turn off cell phones , beepers and other noise making devices. Show all work on the front of the test papers. If you need more room, make a clearly indicated note on the front of the page, "MORE ON BACK", and use the back. The back of the page will not be graded without an indication on the front. You may use any of the approved class textbooks or Motorola manuals. You may not use any notes (mine or yours), examples, homework, labs, books, or calculators. Be sure your exam consists of 4 distinct pages. If you separate your exam pages, put your name at the top of each test page. Read each question carefully and follow the instructions . You must pledge and sign this page in order for a grade to be assigned. In programs, the use of comments may result in more partial credit. The point values for problems may be changed at prof’s discretion. The space provided does not necessarily represent the amount of writing necessary. Part of your grade on tests, quizzes, labs, etc. is based not only on solving the problem you are presented with, but the manner in which you solve it. For example, there is a difference between two programs that meet the given specifications, but one is an elegant, extensible 20-line solution, while the other is an obfuscated 100-line program that also meets the specifications but would be difficult to extend later. Just as your future employer would value the latter program less than the first, so will I in grading your assignments. This exam counts for 26.5-27 % of your total grade. Unless otherwise stated assume the following: The oscillator frequency is precisely 4MHz. The code should run on a 68HC12B32 with 64k of external RAM and without the D-Bug4744 monitor, but with the internal EEPROM, RAM and Registers of your 68HC12 chip. You may assume all internal register equates (at $0000–$01FF) are already done , e.g., PORTT equ $00AE . Also already done are all the bit equates that you may need using the standard I have used in class and on the posted web examples (e.g., BIT0 equ %00000001, BIT76 equ %11000000, INV7 equ %01111111 ). PLEDGE: On my honor as a University of Florida student, I certify that I have neither given nor received any aid on this examination, nor I have seen anyone else do so. __________________________ _______________________ ________________ PRINT YOUR NAME SIGN YOUR NAME DATE ( 10 Apr 07 ) Regrade comments below. Give page # and problem # and reason for the petition. Pages
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ex2_s07 - University of Florida Department of Electrical &...

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